CN203892875U - Safety release and recovery system for liquefied coal-bed gas low-temperature pipeline - Google Patents
Safety release and recovery system for liquefied coal-bed gas low-temperature pipeline Download PDFInfo
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- CN203892875U CN203892875U CN201420334270.1U CN201420334270U CN203892875U CN 203892875 U CN203892875 U CN 203892875U CN 201420334270 U CN201420334270 U CN 201420334270U CN 203892875 U CN203892875 U CN 203892875U
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- 238000011084 recovery Methods 0.000 title abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- 238000001514 detection method Methods 0.000 claims description 5
- 238000012806 monitoring device Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The utility model provides a safety release and recovery system for a liquefied coal-bed gas pipeline. On the condition that the liquefied coal-bed gas low-temperature pipeline operates in a normal mode and shuts down or leaks emergently, an emergency cut-off valve is turned off, the temperature of liquefied coal-bed gas in the pipeline rises slowly, the pressure in the pipeline increases, safety valves are turned on, and gas-liquid two-phase coal-bed gas is released to a low-temperature recovery master tank; the low-temperature recovery master tank is provided with a pressure monitoring device; when the pressure in the low-temperature recovery master tank is normal, the coal-bed gas is conveyed to a BOG recovery system, the pressure in the low-temperature recovery master tank exceeds the pressure designed for a tank body, a flare release valve is controlled to be turned on, and the coal-bed gas is conveyed to a flare system to be combusted. The safety release and recovery system has the advantages that through recycling and reusing of the low-temperature recovery master tank, waste is reduced; meanwhile, the flare release valve is controlled through the pressure monitoring device to release the coal-bed gas into the flare system for combustion, and consequently the safety is improved.
Description
Technical field
The utility model relates to liquefaction coalbed cryogenic piping safety relief reclaiming system, is applicable to LNG low-temperature liquid pipe safety relief system applies.
Background technique
In recent years, along with a large amount of constructions of China LNG factory, generally coal gas gasification factory directly enters full factory flare system or blowdown system by releasing of all inflammable gass, causes waste and the environmental pollution of high-quality coal bed gas resource.Meanwhile, during existing safety relief device piping design, do not consider temperature and the STRESS VARIATION disturbance of cryogenic piping, cause pipe vibration and cracking, affect safety.
Model utility content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides liquefaction coalbed cryogenic piping safety relief reclaiming system.
The technical solution of the utility model is: liquefaction coalbed cryogenic piping safety relief reclaiming system, comprise: cryogenic piping cut-off valve, safety valve before cut-off valve, safety valve after cut-off valve, reducer union, low temperature reclaims total tank, described cryogenic piping cut-off valve is arranged on coal-seam gas cryogenic piping, before described cut-off valve, safety valve inlet pipeline connects the inlet pipeline of cryogenic piping cut-off valve, before cut-off valve, safety valve outlet pipe connects reducer union, after described cut-off valve, safety valve inlet pipeline connects cryogenic piping cut-off valve outlet conduit, after cut-off valve, safety valve outlet pipe connects reducer union, described reducer union outlet connects by safety valve outlet pipe the inlet pipeline that low temperature reclaims total tank, described low temperature reclaims total canned pressure-detecting device that has, low temperature reclaims total tank and is connected with two-way outlet pipeline, one way outlet duct length is at least 80m place torch bleeder valve is housed, another way outlet pipeline is at least 80m place and connects BOG reclaiming system, the electric controller of described torch bleeder valve is by the pressure switch of electric wire Bonding pressure detection device.
Liquefaction coalbed cryogenic piping safety relief reclaiming system, comprise: cryogenic piping cut-off valve, safety valve before cut-off valve, safety valve after cut-off valve, reducer union, low temperature reclaims total tank, described cryogenic piping cut-off valve is arranged on coal-seam gas cryogenic piping, before described cut-off valve, safety valve inlet pipeline connects the inlet pipeline of cryogenic piping cut-off valve, before cut-off valve, safety valve outlet pipe connects reducer union, after described cut-off valve, safety valve inlet pipeline connects cryogenic piping cut-off valve outlet conduit, after cut-off valve, safety valve outlet pipe connects reducer union, described reducer union outlet connects by safety valve outlet pipe the inlet pipeline that low temperature reclaims total tank, described low temperature reclaims total canned pressure-detecting device that has, low temperature reclaims total tank and is connected with two-way outlet pipeline, one way outlet pipeline connects torch bleeder valve after heater is housed, another way outlet pipeline connects BOG reclaiming system after heater is also housed, the electric controller of described torch bleeder valve is by the pressure switch of electric wire Bonding pressure detection device.
Described safety valve outlet pipe caliber is more than or equal to DN50, and inlet pipeline upper left side 45 degree that the end portion of safety valve outlet pipe reclaims total tank from low temperature connect inlet pipeline.
Described safety valve outlet pipe caliber is less than or equal to DN40, and the end portion of safety valve outlet pipe reclaims the vertical inlet pipeline that connects in inlet pipeline top of total tank from low temperature.
Compared with prior art, the beneficial effects of the utility model are: by the recycling of low temperature recycling can, cut the waste, control torch bleeder valve simultaneously enter torch burning by pressure monitoring device, improved Security.
Accompanying drawing explanation
The example structure schematic diagram that Fig. 1 provides for the utility model.
In figure: 1. safety valve before cut-off valve, 2. safety valve after cut-off valve, 3. reducer union, 4. low temperature reclaims total tank, 5. cryogenic piping cut-off valve, 6. safety check, 7. pressure-detecting device, 8. torch bleeder valve, 9. coal-seam gas cryogenic piping, 10. safety valve outlet pipe, 11. inlet pipelines.
Embodiment
In order more clearly to understand the technical solution of the utility model, below in conjunction with accompanying drawing, the utility model is described in further detail.
With reference to Fig. 1, the cryogenic piping of liquefaction coalbed shown in figure safety relief reclaiming system, comprise: cryogenic piping cut-off valve 5, safety valve 1 before cut-off valve, after cut-off valve, safety valve 2, reducer union 3, low temperature reclaims total tank 4, cryogenic piping cut-off valve 5 is arranged on coal-seam gas cryogenic piping 9, safety check 6 imports connect cryogenic piping cut-off valve 5 outlet conduits, before cut-off valve, safety valve 1 inlet pipeline connects the inlet pipeline of cryogenic piping cut-off valve 5, before cut-off valve, safety valve 1 outlet conduit connects reducer union 3, after cut-off valve, safety valve 2 inlet pipelines connect safety check 6 outlet conduits, after cut-off valve, safety valve 2 outlet conduits connect reducer union 3, reducer union 3 outlets connect by safety valve outlet pipe 10 inlet pipeline 11 that low temperature reclaims total tank 4, low temperature reclaims total tank 4 pressure-detecting device 7 is housed.
Low temperature reclaims total tank 4 and is connected with two-way outlet pipeline, and for making to manage interior gas pressure and temperature meets usage requirement, a way outlet pipeline connects torch bleeder valve 8 after heater is housed, and another way outlet pipeline connects BOG recovery channel after heater is also housed; Or be, one way outlet duct length is at least 80m place torch bleeder valve (8) is housed, when duct length is more than or equal to 80m, can not fill heater, another way outlet pipeline is at least 80m place and connects BOG recovery channel, when duct length is more than or equal to 80m, can not fill heater.
When safety valve outlet pipe 10 calibers are more than or equal to DN50, the end portion of safety valve outlet pipe 10 reclaims the inlet pipeline 11 of total tank 4 upper left side following current from low temperature enters to 45 degree mitereds, when safety valve outlet pipe 10 calibers are less than or equal to DN40, the end portion of safety valve outlet pipe 10 vertically accesses from the top of inlet pipeline 11.
Before cut-off valve, safety valve 1 inlet pipeline connects the inlet pipeline of cryogenic piping cut-off valve 5, the pressure drop of entrance pipeline section is not higher than 3% of design pressure, after cut-off valve, safety valve 2 inlet pipelines connect safety check 6 outlet conduits, and the pressure drop of entrance pipeline section is not higher than 3% of design pressure.
Liquefaction coalbed cryogenic piping 9 moves in normal mode, under shutdown or urgent leak case, emergency shutdown cryogenic piping cut-off valve 5, intraluminal fluid coal-seam gas temperature is slowly gone up, overpressure increases, before cut-off valve, after safety valve 1 and cut-off valve, safety valve 2 is opened, gas-liquid two-phase coal-seam gas is released to low temperature and is reclaimed total tank 4 by reducer union 3, for the sake of security, low temperature reclaims total tank 4 and is provided with pressure monitoring device 7, the electric controller of torch bleeder valve 8 is by the pressure switch of electric wire Bonding pressure detection device 7, when the little 0.75MPa of tank internal pressure, torch bleeder valve 8 is closed, coal-seam gas is delivered to BOG reclaiming system, by the high-quality coal-seam gas product recycling after reclaiming, when tank internal pressure surpasses 0.75MPa, controlling torch bleeder valve 8 opens, coal-seam gas is delivered to flare system burning.
Above-described specific embodiment is only to the utility model explanation for example, and the equivalence of doing according to structure, feature and principle described in the utility model patent claim therefore all changes or modifies, and is included in the utility model patent claim.
Claims (4)
1. liquefaction coalbed cryogenic piping safety relief reclaiming system, it is characterized in that: comprising: cryogenic piping cut-off valve (5), safety valve (1) before cut-off valve, safety valve after cut-off valve (2), reducer union (3), low temperature reclaims total tank (4), described cryogenic piping cut-off valve (5) is arranged on coal-seam gas cryogenic piping (9), before described cut-off valve, safety valve (1) inlet pipeline connects the inlet pipeline of cryogenic piping cut-off valve (5), before cut-off valve, safety valve (1) outlet conduit connects reducer union (3), safety valve after described cut-off valve (2) inlet pipeline connects cryogenic piping cut-off valve (5) outlet conduit, safety valve after cut-off valve (2) outlet conduit connects reducer union (3), described reducer union (3) outlet connects low temperature by safety valve outlet pipe (10) and reclaims the inlet pipeline (11) of total tank (4), described low temperature reclaims total tank (4) pressure-detecting device (7) is housed, low temperature reclaims total tank (4) and is connected with two-way outlet pipeline, one way outlet duct length is at least 80m place torch bleeder valve (8) is housed, another way outlet pipeline is at least 80m place and connects BOG reclaiming system, the electric controller of described torch bleeder valve (8) is by the pressure switch of electric wire Bonding pressure detection device (7).
2. liquefaction coalbed cryogenic piping safety relief reclaiming system, it is characterized in that: comprising: cryogenic piping cut-off valve (5), safety valve (1) before cut-off valve, safety valve after cut-off valve (2), reducer union (3), low temperature reclaims total tank (4), described cryogenic piping cut-off valve (5) is arranged on coal-seam gas cryogenic piping (9), before described cut-off valve, safety valve (1) inlet pipeline connects the inlet pipeline of cryogenic piping cut-off valve (5), before cut-off valve, safety valve (1) outlet conduit connects reducer union (3), safety valve after described cut-off valve (2) inlet pipeline connects cryogenic piping cut-off valve (5) outlet conduit, safety valve after cut-off valve (2) outlet conduit connects reducer union (3), described reducer union (3) outlet connects low temperature by safety valve outlet pipe (10) and reclaims the inlet pipeline (11) of total tank (4), described low temperature reclaims total tank (4) pressure-detecting device (7) is housed, low temperature reclaims total tank (4) and is connected with two-way outlet pipeline, one way outlet pipeline connects torch bleeder valve (8) after heater is housed, another way outlet pipeline connects BOG reclaiming system after heater is also housed, the electric controller of described torch bleeder valve (8) is by the pressure switch of electric wire Bonding pressure detection device (7).
3. liquefaction coalbed cryogenic piping safety relief reclaiming system according to claim 1 and 2, it is characterized in that: described safety valve outlet pipe (10) caliber is more than or equal to DN50, inlet pipeline (11) upper left side 45 degree that the end portion of safety valve outlet pipe (10) reclaims total tank (4) from low temperature connect inlet pipeline (11).
4. liquefaction coalbed cryogenic piping safety relief reclaiming system according to claim 1 and 2, it is characterized in that: described safety valve outlet pipe (10) caliber is less than or equal to DN40, the end portion of safety valve outlet pipe (10) reclaims the vertical inlet pipeline (11) that connects in inlet pipeline (11) top of total tank (4) from low temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334270.1U CN203892875U (en) | 2014-06-23 | 2014-06-23 | Safety release and recovery system for liquefied coal-bed gas low-temperature pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420334270.1U CN203892875U (en) | 2014-06-23 | 2014-06-23 | Safety release and recovery system for liquefied coal-bed gas low-temperature pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892875U true CN203892875U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420334270.1U Expired - Lifetime CN203892875U (en) | 2014-06-23 | 2014-06-23 | Safety release and recovery system for liquefied coal-bed gas low-temperature pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN203892875U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442223A (en) * | 2018-09-21 | 2019-03-08 | 大连理工大学 | A kind of injection and discharge recovery system applied to circulation line flowing safety |
-
2014
- 2014-06-23 CN CN201420334270.1U patent/CN203892875U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109442223A (en) * | 2018-09-21 | 2019-03-08 | 大连理工大学 | A kind of injection and discharge recovery system applied to circulation line flowing safety |
| CN109442223B (en) * | 2018-09-21 | 2020-09-29 | 大连理工大学 | Injection and discharge recovery system applied to flow safety of circulating pipeline |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141022 |